Apparatus for carburetion



April 23, 1963 R. A. GREENE APPARATUS FOR CARBURETION 2 Sheets-Sheet 1Filed June 29. 1961 INVENTOR.

(7kb-ENE M TToRn/f PS April 23, 1963 R. A. GREENE 3,086,753

APPARATUS FOR CARBURETION Filed June 29, 1961 2 Sheets-Sheet 2 92 92INVENToR.

94 94 Rosi/a7 f1. @eff/vf ,3 Wam/514s United States Patent O 3,035,758APPARATUS FOR CARBURETION Robert A. Greene, S50 Seabreeze Blvd., Suite4, Daytona Beach, Fla. Filed June 29, 1961, Ser. No. 120,677 16 Claims.(Cl. 2611-44) This invention relates to apparatus for carburetion and isby way of being a further improvement and developlo ment in this fieldover what is disclosed and claimed in my co-pending Unit-ed Statesapplication, Serial No. 762,369, Method and Apparatus for Carburetion,filed September 22, 1958, now Patent 3,006,619.

In my Patent 3,006,619 I disclose a carburetor having an iris typediaphragm with fuel-supplying jets arranged in associatoin therewith soas t'o become progressively effective as the diaphragm opens. In thepresent -application somewhat the same principle is employed in thatthere are a plurality of fuel-supplying jets in the carburetor whichbecome progressively effective as an air supply control member is movedfrom closed to open position.

A particular object of the present invention is the provision of animproved lapparatus for carburetion which will maintain a more uniformratio of fuel to `air throughout lthe range of operating conditions ofthe carburetor than has been possible heretofore.

Another object of this invention is the provision of a novel jetarrangement for carburetors with the jets being directly and positivelyunder the control of a movable air supply control member.

Still another object of this invention is the provision of la carburetorarrangement having a plurality of jets in which the jets are graduallypositively closed off when the air supply control member of thecarburetor moves toward -a closed position, and wherein each jet hassubstantially the same fluid supply as every other jet leading touniform operating conditions.

These and other objects of the present invention will become moreapparent upon reference to the following specification taken inconnection with the laccompanying drawings in which:

FIGURE l is a vertical sectional view through one carburetor arrangementaccording to my invention;

FIGURE 2 is a vertical sectional view indicated by line 2 2 on FIGURE 1;

FIGURE 3 is a perspective view showing the movable air control member orslide valve and the jets controlled thereby;

FIGURE 4 is a vertical sectional view indicated by line 4 4 on FIGURE 3showing at ysomewhat enlarged scale one of the' jets of the carburetor;

FIGURE 5 is -a sectional view indicated by line 5 5 on FIGURE l showingthe manner in which the slide valve is sealed at the wall of thecarburetor;

FIGURE 6 is a View similar to FIGURE 1, but showing a somewhatdierent-arrangement;

FIGURE 7 is a plan sectional view of the `arrangement of FIGURE 6 and isindicated by line 7 7 on FIGURE 6;

FIGURE 8 is a sectional View through one of the jets and is indicated byline 8 3 on FIGURE 7;

FIGURE 9 is a fragmentary view showing'the manner -in which the rod foradjusting the slide valve of the carburetor is connected to the slidevalve;

FIGURE 10 is a perspective view showing a somewhat different slide valvearrangement;

FIGURE 1l is a perspective view like FIGURE 10, but showing stillanother slide valve arrangement;

FIGURE 12 is a sectional view indicated by line 12-12 3,@3S PatentedApr. 23, 1963 on FIGURE 11 showing the varrangement for supplying fluidfuel to the jets;

FIGURE 13 is a sectional view indicated by line 13 13 on FIGURE l2showing one of the jets in section and the fuel supply conduit leadingthereto;

FIGURE 14 lis -a perspective View showing still another -type of slidevalve arrangement; and

FIGURE l5 is `a sectional View indicated by line 15-15 on FIGURE 14showing the slide valve arrangement thereof in cross-section.

Referring to the drawings somewhat more in detail, in FIGURES l and 2there is shown a carburetor arrangement comprising the body part 10forming a down-draft passage from air cleaner 12 to engine manifold 14.Attached to the side of body part 1G is a fuel supply chamber 16 adaptedfor being supplied with fuel in any conventional manner, as by a pump,`and having conventional means therein such as a float controlled valvefor maintaining the liquid level therein at a predetermined fixed point.

Fuel chamber 16 communicates by way `of a conduit 1S in body part I0with a jet block 2d which consists of a generally L-shaped .invertedmember having the vertical leg part 22 and at the top the laterallyextending horizontal leg part 24. Extending along the bottom of verticalleg part 22 is a passage 26 to which conduit 18 is connected forsupplying liquid fuel thereto.

In the laterally extending leg part 24 is a plurality of venturi shapedpassages 26a which form the jets for the carburetor. Each of thesepassages has a channel 28 leading from the throat to passage 26 so thateach jet has fuel supplied individually thereto from passage 26 so thatthe fuel supply to all of the jets is uniform at all times.

According t'o this invention, -the jet block 20 extends substantiallycompletely across body part I0 with the jets arranged on about adiameter thereof. The passage of air through the passage in thecarburetor is under the control of a slide valve 30 which, Ias will'best be seen in FIGURE 4, rests on top of the transversely extendingleg 24 of the assembly block and has an L-shaped mem'- ber 32 connectedtherewith that engages the bottom of leg part 24. It will be observedthat the jets 26a are closed at both the top and bottom by the slidevalve when the valve is positioned to make the jets inoperative.

As will be seen in FIGURE 3, the slide valve 30 is supported on a plateelement 34 carried in the upper part of body 10 and which plate has anopening 36 through which air ows downwardly through the body 10. The jetblock is located in about the middle of this opening and slideablyresting on the plate is the aforementioned slide valve 30. Guideelements 38 are carried by the plate 34 so as to support and guide slidevalve SG.

It will be appreciated that when slide valve 36 is moved toward theright as it is viewed in FIGURES l and 3, the opening for air isprogressively increased while the individual jets of the jet assemblyblock are made successively effective thereby maintaining a constantratio of fuel to air in the combustible mixture being drawn from thecarburetor and into the intake manifold.

For the purpose of controlling the idling speed of the carburetor, thereis a jet 26h at the extreme left end of the jet assembly block as it isviewed in FIGURES l and 3 which is always exposed since the slide valve30 never completely covers this jet. The exact position of the slidevalve in its engine idling position is under the control of an abutmentscrew 40 while the fuel supplied through the idling jet 26h can beregulated by the adjustable needle valve 42. In this manner, engineidling conditions are under complete control, but this control, ofcourse, has no effect on the operation of the carburetor when the slidevalve is open.

Operation of the slide valve can be had by connecting a rod 44 theretowhich is under manual control as by being connected with the vehicleaccelerator pedal.

The slidevalve is sealed to body so that the slide valve can be movedwithout admitting air from the side thereof by a resilient rubber-likesealing means generally indicated at 46 in FIGURES 1 and 5. Numeroussealing arrangements are possible, and in many cases a close fittingmetal to metal seal will be satisfactory, although I prefer to employ agasket means as illustrated.

`In the modification of FIGURES `6 through 9, the Ybody part of thecarburetor is indicated at 50 and there is a jet lassembly 52 thereinhaving `'a fuel supply passage 54 and the channels 56 leading from theyfuel supply passage to the individual jets '58 arranged in a laterallyextending portion of the jet assembly at the top thereof.

In the FIGURES 6 through 9` modification, I obtain distribution of thefuel supplied over substantially the entire area of the yair fiowpassage by arranging the jets in a plurality of rows, for example, intwo rows arranged to form a V as inV FIGURE 7.

Inasmuch yas the jet-s -are arranged to form a V, the slide valve 60merely engages the top of the jet Iassembly block 52 and does not closeofi the under sides of the jets 58. The plate on which the slide valve60 rests is identified at 62, and this is 'a member that rests on top ofthe body 10. The plate carries guide means `64 for the slide valve andthere is a valve actuating rod 66 extending sealingly through a wallmember 68 formed in an extension 70 that is a part of the valve body.

As in the fir-st modification, idler jet 58a is provided with the fuelsupply thereto being under the control of the adjustable needle valve72. The idling position of the slide valve, which is illustrated atFIGURE 7, can, las in the first modification, be under the control of-an abutment screw 74 carried by rod 66.

FIGURE 10 shows a slight modification in the construction of a slidevalve member 76 'which is so formed as toV have notch 78 at the innerend thereof, which provides an opening for the movement of air past theidler jet when the slide valve is closed.

FIGURES 11, 12 and 13 show an arrangement wherein there are two parallelrows of jets as at 80 and 82, which Iare under the control of a slidevalve member 84. Slide valve member 84 has a central notch 86 forexposing idler jet y8S when the slide valve is closed and also hassomewhat shorter notches 90 at the sides so that the first openingmovement of the slide valve will commence to expose the main jets.

'As will be seen in FIGURES 12 land y11i, the jets are supported in ablock 92 having fuel passage means 94 therein corresponding to thepassage means 26 described in connection with the Ifirst modification.

FIGURES 14 and 15 show a modified arrangement wherein there is a slidevalve 100 semi-circular in crosssection and which slides in an arcuateguide means 102 on a support plate 104. The jet block is indicated at106 andV is constructed about the sa-me yas the jet block in the firstdescribed modification. As in the first described modification, and asin the modification of FIGURES 11 through 13, -slide valve 100 has anL-shaped member 108 lattached thereto so that both the tops and botto'msof the jet passages Iare closed by the slide -Valve as it moves towardclosed position.

It will be understood that this invention is susceptible to modificationin order to adapt it to different usages and conditions; and,accordingly, it is desired to comprehend such modifications within thisinvention as may fall within the scope of the appended claims.

I claim:

1. In a carburetor; a carburetor body having yan air flow passagetherethrough, la jet block lfixedly mounted in said passage having aplurality of individual jets therein distributed in a plane transverseto said air passage, means for supplying lfuel to said jets, and a slidevalve in said passage movable laterally therein for controlling the flowof air therethrough, said slide valve having a surface coplanar with oneend of said jets so as progressively to uncover the jets when moving inthe opening direction and progressively to close the jets when moving inthe closing direction.

2. In a carburetor; a carburetor body having an air flow passagetherethrough, a jet block xedly mounted in' said passage having aplurality of individual jets therein distributed in a plane transverseto said air passage, means for supplying fuel to said jets, and a slidevalve in said passage movable laterally therein for con-trolling thefiow of air therethrough, so as progressively to uncover the jets whenmoving in the opening direction and progressively to lclose the jetswhen' moving in the 'closing direction, an idler jet in said passage,and said slide valve being arranged to permit air flow past said idlerjet when the slide valve is in its closed position.

3. In a carburetor; a carburetor body having a vertical air flow passagetherethrough, a jet block xedly mounted in said passage having aplurality of jets therein distributed in a lateral direction relative tosaid air passage, a slide valve in said air passage movable laterallythereof for controlling lthe flow of air through the passage, said jetshaving upper open ends, and said slide valve having la surface coplanarwith said upper open ends of said jets for engaging and closing saidjets progressively when the valve moves in its closing direction.

4. In a carburetor; a carburetor body having a vertical air fio'wpassage therethrough, a plurality of jet means distributed in a lateralplane in said air flow passage in fixed positions therein, each jetmeans comprising a vertical venturi having open topl and bottom ends andhuid supply means connected to the throat thereof, a slide valve inIsaid passage movable laterally thereof for con'- trolling the flow ofIair therethrough, and said slide valve having a surface coplanar withthe upper open ends of said jet means to interrupt the iiow of airtherethrough when the slide valve is disposed in closing relationthereto.

v5. In a carburetor; a carburetor body having a vertical air flowpassage therethrough, a plurality of jet means distributed in a lateralplane in' said air flow passage in fixed positions therein, each jetmeans comprising a vertical venturi having open top and bottom ends andfluid supply means connected to the throat thereof, :a slide valveV insaid passage movable laterally thereof for controlling the dow of airtherethrough, and said slide valve having a surface coplanar with theupper open ends of said jet means to interrupt the flow of airtherethrough when the slide valve is disposed in closing relationthereto, and said jet means being distributed so as to be progressivelyopened one at a time by said slide valve as it moves in its openingdirection andV to be progressively closed one at -a time by the slidevalve as it moves in its closing direction.

I6. In a carburetor; 'a carburetor body having a vertical flow passagetherethrough, a plurality of individual jets distributed in a lateralplane in said'passage, each jet comprising a vertical venturi passageand fuel supply means connected to the throat thereof, a slide valvecarried by said body an'd movable laterally of said passage controllingvthe flow of air therethrough, said slide valve having its bottomsurface in said plane of the upper ends of said jets so as toprogressively open and close said jets during opening and closingmovements respectively of said slide valve, and a means carried by saidslide valve engaging the lower ends of said jets and being coextensivewith said slide valve in the direction of movement thereof forcontrolling the lower ends of said jets simultaneously with thecontrolling of the upper ends thereof.

7. In a carburetor; a canburetor body having a vertical flow passagetherethrough, a jet block in said passage, a plurality of jets arrangedin the jet block, each `comprising a vertical venturi and fuel supplymeans connected to the throat thereof, a slide `valve slideablelaterally in said body for controlling the ow of air through saidpassage, said slide valve engaging the upper ends of said jets, saidjets being arranged in ya row across the block in the direction ofImovement of the slide valve and an L-shaped member carried by the slidevalve extendin-g beneath the jets and controlling the lower ends thereofsimultaneously with the controlling of the upper ends thereof.

8. In a carburetor; a -carburetor body having a vertical flow passagetherethrough, a jet block in said passage, a plurality of jets arrangedin the jet block, each comprising a vertical venturi and `fuel supplymeans connected to the throat thereof, a slide valve slideable laterallyin said body for controlling the ow of air through said passage, saidslide valve engaging the upper ends of said jets, said jets beingarranged in a :plurality of rows extending parallel to the direction ofmovement of said slide valve, and means on said slide valve engaging.the ends of said jets for controlling the lower ends thereofsimultaneously with the control of the upper ends thereof.

9. lIn a carburetor; a carburetor body having a vertical air flowpassage therethrough, a jet block carried by the body and extendingacross said passage, said block having a laterally offset portion at itsupper end, a slide valve movable laterally in said air passage andresting on the top of said laterally offset portion, a member carried bythe slide valve engaging the under side of said laterally offsetportion, a plurality of jets in said laterally offset portion, eachcomprising :a vertical venturi passage extending through said portionand fuel supply means leading to the throat of each said venturipassage.

10. ln a carburetor; a carburetor body having a vertical air flowpassage therethrough, Ia jet block carried by the body and extendingacross said passage, said block having a laterally offset portion at itsupper end, a slide valve movable laterally in said vair passage andresting on the top of said laterally offset portion, a member carried bythe slide valve engaging the under side of said laterally offsetportion, a plurality of jets in said laterally offset portion, eachcomprising -a vertical venturi passage extending through said portionand fuel supply means leading to the throat of each said venturipassage, there being an idler jet adjacent the side of the llow passagetoward which the slide valve moves in its closing direction and meanspertaining to the slide valve for permitting air flow through thepassage in the region of said idler jet when the slide valve is in itsclosed position.

Y l. ln a carburetor; a carburetor body having a vertical air flowpassage therethrough, a jet block carried by the body and extendingacross said passage, said block having a laterally offset portion at itsupper end, a slide valve movable laterally in said passage and restingon the top of said laterally offset portion, a member carried by theslide valve engaging the under side of said laterally oifset portion, aplurality of jets in said laterally offset portion, each comprising avertical venturi passage extending through said portion and fuel supplymeans leading to the throat of each said venturi passage, there being anidler jet adjacent the side of the oW passage toward which the slidevalve moves in its closing direction and means pertaining to the slidevalve for permitting air flow through the passage in the region of saididler jet when the slide valve is in its closed position, there being amain fuel supply passage in said jet block, individual channels leadingfrom said fuel supply to the throat of said venturi passages.

12. ln a carburetor; a carburetor body having a vertical air ow passagetherethrough, a jet block carried by the body and extending across saidpassage, said block having a laterally offset portion at its upper end,a slide valve movable laterally in said air passage and resting on thetop of said laterally offset portion, a member carried by the slidevalve engaging the under side of said laterally offset portion, aplurality of jets in said laterally odset portion, each comprising avertical venturi passage extending ythrough said por-tion and fuelsupply means leading to the throat of each said venturi passage, therebeing an idler jet adjacent the side of the ow passage toward which theslide valve moves in its closing direction vand means pertaining to theslide valve for permitting air flow through the passage in the region ofsaid idler jet when the slide valve is in its closed position, therebeing a main fuel supply passage in said jet block, individual channelslending from said fuel supply to the throat of said venturi passages, afloat controlled fuel supply chamber, and means connecting said chamberwith said main fuel supply passage.

13. In a carburetor; a carburetor body having a vertical air ow passagetherethrough, a jet block carried by the body and extending across saidpassage, said block being relatively narrow and having a laterallyoffset portion at its upper end, a support plate adjacent the upper endof the jet block having an aperture through which air flows in passingthrough said air passage, a slide valve slideably mounted on said plateand having its one surface coplanar with the upper surface of saidoffset portion, guide means on said plate guiding and sealing said slidevalve so that it can be moved laterally in said air passage to controlair flow therethrough, a member carried by the slide valve engaging theunder side of the laterally offset portion of said jet block, saidmember being substantially coextensive With said slide valve, aplurality of jets in said laterally offset portion, each jet comprisinga vertical venturi passage extending completely through said offsetportion, fuel supply means leading to the throat of each said venturipassage, an idler jet adjacent the side of the air ilow passage towardwhich the slide valve moves in its closing direction, means associatedwith the slide valve for permitting air flow through .the passage in theregion of said idler jet when the slide valve is in its closed position,adjustable means for controlling the fuel supply to said idler jet, andadjustable means associated with said slide valve for determining theclosed position thereof.

14. In a carburetor; a carburetor body having a vertical air ow passagetherethrough, a jet block carried by the body and extending across saidpassage, said block being relatively narrow and having a laterallyyoffset portion at its upper end, a support plate adjacent the upper endof the jet block having an aperture through which air flows in passingthrough said air passage, a slide valve slideably mounted on said plateand having its one surface coplanar with the upper surface of saidoffset portion, guide means on said plate guiding and sealing said slidevalve so that it can be moved laterally in said air passage to controlair flow therethrough, a member carried by the slide valve engaging theunder side of the laterally offset portion of said jet block, saidmember being substantially coextensive with said slide valve, aplurality of jets in said laterally oifset portion, each jet comprisinga vertical venturi passage extending completely through -said offsetportion, fuel supply means leading to the throat of each sai-d venturipassage, an idler jet adjacent the side of the air ilow passage towardwhich the slide valve moves in its closing direction, means associatedwtih the slide valve for permitting air oW through the passage in theregion of said idler jet when the slide valve i-s in its closedposition, adjustable means for controlling the fuel supply to said idlerjet, and adjustable means associated with said slide valve fordetermining the closed position thereof, said fuel supply meanscomprising individual channels leading from the throats of saidventuries downwardly to a lower portion of said jet block, a main fuelsupply conduit in the lower portion of said jet block into which saidchannels open, .aud a float controlled fuel supply chamber connected tosaid main fuel supply conduit.

15. In a carburetor; a carburetor body having a vertical air ow passagetherethrough, a jet block in said passage having a plurality of jetstherein distributed in a adsense lateral direction relative to said airpassage, a slide valve in said ai-r passage, movable laterally thereofVfor controlling the flow of air through the passage, said jets havingupper open ends, and said slide valve being adapted for engaging andclosing said jets progressively when the valve moves in it-s closingdirection, an apertured plate on which said slide valve rests and onwhich the slide valve slides when moving laterally of the air passage,said slide valve being at on the bottom and arcuate on the top, andarcuate guide means carried lby the plate engaging the slide valve forguiding it in its sliding movements.

16. In a carburetor; va carburetor body having a vertical air ow passagetherethrough, a plurality of jet means distributed in a lateral plane insaid air ow passage, each jet means comprising a vertical venturi andfluid supply 15 3,006,619

means connected to the throat thereof, a .slide valve in said passagemovable laterally thereof for controlling the ow of air therethrough,and said slide Valve engaging the upper yopen ends of said jet means tointerrupt the flow of air therethrough when the slide valve is disposedin closing relation thereto, said slide Valve being semicircular incross-'section with the at side `on the bottom, a plate `on which theslide valve rests having an aperture controlled by the slide valve, andsemi-circular guide means on the plate engaging the top of the yslidevalve for supporting and gui-ding the slide valve.

References Cited in the file of this patent UNITED STATES PATENTS GreeneOct. 31, 196-1

1. IN A CARBURETOR; A CARBURETOR BODY HAVING AN AIR FLOW PASSAGETHERETHROUGH, A JET BLOCK FIXEDLY MOUNTED IN SAID PASSAGE HAVING APLURALITY OF INDIVIDUAL JETS THEREIN DISTRIBUTED IN A PLANE TRANSVERSETO SAID AIR PASSAGE, MEANS FOR SUPPLYING FUEL TO SAID JETS, AND A SLIDEVALVE IN SAID PASSAGE MOVABLE LATERALLY THEREIN FOR CONTROLLING THE FLOW